Evolution of microstructure and residual stresses in gradually ground/polished 3Y-TZP

A comprehensive study of progressively ground/polished 3Y-TZP was performed with the aim of better understanding the mechanisms driving the microstructural modifications observed after such procedures, and identifying the processing parameters leading to optimal microstructures (i.e. ageing-protecti...

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Bibliographic Details
Published inJournal of the European Ceramic Society Vol. 40; no. 4; pp. 1582 - 1591
Main Authors Minguela, J., Slawik, S., Mücklich, F., Ginebra, M.P., Llanes, L., Mas-Moruno, C., Roa, J.J.
Format Journal Article Publication
LanguageEnglish
Published Elsevier Ltd 01.04.2020
Elsevier
Subjects
Ceramic materials
Enginyeria dels materials
Fractura
Fracture
Grinding
Materials ceràmics
Microstructure
Phase transformation
Propietats mecàniques
Residual stresses
Zirconi
Zirconia
Zirconium oxide
Àrees temàtiques de la UPC
Zirconia
Phase transformation
Residual stresses
Microstructure
Grinding
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Summary:A comprehensive study of progressively ground/polished 3Y-TZP was performed with the aim of better understanding the mechanisms driving the microstructural modifications observed after such procedures, and identifying the processing parameters leading to optimal microstructures (i.e. ageing-protective and damage-free). Gradually ground/polished surfaces were produced, yielding four different topographies of increasing roughness (grades 1–4) and two different textures (unidirectionally, U, and multidirectionally, M). Phase transformation, microstructure and residual stresses were investigated by means of advanced characterization techniques. It was found that low-roughness mildly ground/polished specimens (i.e. 2-M/U) presented a nanometric layer with the ageing-related protective features generally associated with coarsely ground specimens. A lower limit for grain refinement in terms of surface abrasion was also found, in which partial recrystallization took place (i.e. 1-M/U). A mathematical relation was established between average surface roughness (Sa), monoclinic volume fraction (Vm) and surface compressive residual stresses, demonstrating that if the processing parameters are controlled, both Vm and residual stresses can be predicted by the measurement of Sa.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2019.10.057